Paper﹣making by the Chinese in the Western Han dynasty(朝代).( )
A.is inventedB.invented
C.was invented
At this time yesterday afternoon, I____ my bike in the street.A. rodeB. is ridingC. was riding
— Have you seen Lin Feng these days?—I saw him yesterday evening. He _______ basketball with other boys.
—Did you notice a boy in blue come in?—No , I didn't because I ______ a movie.
----Has Jack finished painting the picture yet?---- I’ve no idea. But he______ it the whole afternoon.
-- Has your friend completed his design?-- Not yet. He ________ on it last night.